The competition was aimed at celebrating roundabouts that embodied what a car leasing firm optimistically called "the X Factor" - "road layouts that eased traffic congestion while being pleasant to look at."

What they got were entries from frustrated drivers sick of poorly-designed, unattractive edifices that impeded their progress and that were a blight on the landscape.

"The competition was meant as a bit of fun," said a spokesman. "We're delighted that we've had such a positive response from the public, it's just a shame they've not been so complimentary about their nominations."

Roundabouts in Cardiff, Hemel Hempstead, Swindon and Stoke have been singled out for attack and have now been short-listed for the unwanted title of worst roundabout in the UK. Just two roundabouts - one in Nottingham and the other in Letchworth, Hertfordshire - received praise from motorists.

The Queen's Garden's island in Newcastle-under-Lyme was nominated as the most despised in the UK, along with the Culverhouse roundabout on the A48 at Cardiff and Hemel Hempstead's Magic Roundabout, due to its confusing design.

One voter wrote, of the Queen's Garden's island, that it was "a catastrophe ... plagued by constant beeping and motorists stuggling to find the right lanes".

"Common complaints have been poor layouts, worn markings, traffic jams and general confusion, all of which I can understand will frustrate drivers on their regular commute," said the spokesman. "We're hoping to receive more nominations for the best roundabout category and are challenging the public to go out there and snap an island which has in some way improved their lives."

Motorists are asked to email their suggestions, together with a photograph and reasons for their nomination to roundaboutidol@centralcontracts.com. A final decision on the winners - and losers - will be made on April 22.